Per Dominum nostrum Iesum Christum.
Latin text
Per Dominum nostrum Iesum Christum Filium tuum: qui tecum vivit et regnat in unitate Spiritus Sancti Deus, per omnia saecula saeculorum. Amen.
Context
This conclusion offers the prayer through Christ in the Roman liturgical form.
Source: Missale Romanum 1962, Ordo Missae, as published by Divinum Officium.
Divinum Officium